Synopsis
Hee-yeon (Yum Jung-ah) moves to her hometown near Mt. Jang, hoping her mother-in-law recalls how she lost Hee-yeon’s son - Jun-suh. One day, near a cave at Mt. Jang, Hee-yeon meets a girl in tatter which reminds her of Jun-suh. Feeling sorry for the girl, Hee-yeon decides to spare a bed until she helps to find the girl’s parents.
Gradually, the girl mimics Hee-yeon’s daughter, Jun-hee’s name, voice, and look; Eventually, calling Hee-yeon, mom. Strange incidents happened since the girl joins the household and at last, the mother-in-law who suffered from auditory hallucination disappears into the cave with the legend about a mysterious creature. Will Hee-yeon find her son? Will this family find happiness again?